As much as I hate to say it, I really enjoy shounen animes. The fillers kill my soul bit by bit, but there's something just mind-numbingly exciting about beating people mercilessly over and over for some greater cause. It's dumb, but enjoyable.
Nonetheless, my favorite genre, for anything, really, is science fiction. I've written essays about it, so I won't elaborate that much here. Basically, there's something about a potentially possible setting that interests me infinitely more than something either total impossible or already a given.